Home / 1,913.96-2,640.68-1,127.84

Finding the Fourth Proportional to 1,913.96, 2,640.68 and 1,127.84

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Solution

The fourth proportional to 1,913.96, 2,640.68 and 1,127.84 is: 1,556.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.96 : 2,640.68 = 1,127.84 : x
  2. Step 2: Convert to fraction form
    1,913.96/2,640.68 = 1,127.84/x
  3. Step 3: Cross multiply
    1,913.96x = 2,640.68 × 1,127.84
  4. Step 4: Simplify right side
    1,913.96x = 2,978,264.53
  5. Step 5: Solve for x
    x = 2,978,264.53/1,913.96
  6. Step 6: Final answer
    x = 1,556.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.